The 340 is the biggest POS V8 Chrysler ever made.

I was with Chrysler when the Hemi was being sold
That Hemi driver would have fouled his stock plug and been blowing black smoke
He'd bring it back into the Dealer for a carb rebuild and maybe an electronic ignition conversion from his dual points
We couldn't even drive them to lunch without them crapping out
learned to krrp the reves up all the time- what fun
no wonder we could not give them away

what was the deal with that? why were they less reliable than a regular wedge V-8 car?